Apropos current happenings in the US Congress, thanks to anonymous and Horror Lair you can read three-drafts-in-one of Brian Nelson’s Hard Candy (which is now available on DVD). That would be on the movie scripts page.
And, thanks to M you can read some transcripts from the Golden Age of Radio. As you know, companies sponsored a lot of radio shows. Read Raising Junior sponsored by Wheatena and Forty Fathom Trawlers sponsored by 40 Fathom Fish Company (which later became High Liner Foodservice).